The amount of jobs shrank for sure, but a lot of that is due to corporate drivel/woke.

I follow a lot of indie comic creators, most (at least the ones that turn out good product) are still specialized. Pencils/inks seem to be the most combined. Inkers and letterers probably lost the most jobs. Pencils/layouts/inks get combined into one artist more and more these days.

Colors often get sent to Philippines or South America for 'flats / flatting' cheap rates separating / selecting all of the components and layers, and laying down flat colors. Then those flats are sent back to a top tier colorist who adds in all of the gradients, detailed edgework, effects.

Letterers still have their place, but because of digital/scans, one letterer is doing a lot more projects than a traditional letterer would have in the non-digital age.

Books that use a standard font, get called out as cheap. Buyers still like hand letters or custom fonts from a pro letterer the most. Letterers also often do the onomatopoeia / sound effects as words, but a lot of pros build those into their actual layouts and pencils/inks.

A lot of the old pros / big names still do traditional paper pages. Most can do digital, but the reason they keep doing traditional, is you can sell them for a good chunk of money after the book is printed. So they get the page rate from whomever, (or self-published) and then sell the physical page (black and white, colors are almost always digital now) double-dipping.